Track, press the BUTTON of "SmartPad" corresponding matrix
can enable software BUTTON, if the BUTTON of the software
have music, can make it light up the red LED, otherwise light blue
LED, you can use the "Up", "Down", "Left", "Right" BUTTON).
“Down”and“Right” are 0, that is 1-8 lines, 1-8 column
(“Down”and“Right” keys LED turn out state) :